????T-SQL???
???????????create table Name(Code varchar(50))
??????????primary key
???????????У?auto_increment
????????????references
????????not null
??????????drop table family
?????????????create database mydb
????????????drop database mydb
????CRUD??????
????C??create
?????????????
????insert into Nation values('n001'??'????') -- ???
????insert into Name values(''??''??'') --????????????У?????п?????????
????insert into Nation (Code) values('n002')--?????????????е?????
????R??read
????????????
????U??update
????????????
????update Nation set Name='????' --??????
????update Nation set Name='????' where Code='n002' --???????????
????D??delete
????????????
????delete from Nation --??????????е?????
????delete from Nation where Code='n001' --??????????